https://www.cbsnews.com/news/russia-flies-military-observation-plane-over-capitol-pentagon-cia/
Russia flies military observation plane over Capitol, Pentagon, CIA - CBS News
The flight was allowed under the Open Skies Treaty
observation planerussiafliesmilitary
https://arxiv.org/abs/2011.00268
[2011.00268] The observation of in-plane quantum Griffiths singularity in two-dimensional...
Abstract page for arXiv paper 2011.00268: The observation of in-plane quantum Griffiths singularity in two-dimensional crystalline superconductors
in plane